A representative machine with a fixed microphone allows participants to speak, register requests and listen to others. The microphone handle can be adjusted flexibly. The device also provides a two-way earphone connection that allows you to hear people clearly even when the background sounds are very noisy. Built-in speakers will be quiet when the receiver opened to prevent to produce basic function, reduce acoustic feedback headphone output volume to prevent to produce acoustic feedback (when listen to basic language and when open the phone activation), the device can be used as a representative machine already, also can be used as chairman of the machine (DCN ‑ DBCM main seat button requires a separate order), the available cable clamp (DCN ‑ DISCLM, Requires a separate order) to lock loop cable, the device can be selected two kinds of different lengths of microphone control and indicator lamp, microphone with a red or green light, the microphone button with red, green or yellow light-emitting LED lights. Red table microphone is active, "green says it has to accept a request, and yellow of the" VIP ", when the representative to join the notebook list, VIP indicator light will light up (only when using the PC software available), the headset volume control button, hidden "De ‑ init" switch interconnection, two 3.5 mm (0.14 inch) stereo headphone jack socket type, 2 meters (78.7 inches) cable, End with a molded six stitches circular connector, six stitches circular connector to loop connection certificate and approval certification European CE technical specification electrical 30 Hz and 20 kHz frequency response headphones 32 ohm load impedance > < 1 k ohm output power 2 x 15 mW / 32 ohms mechanical indexes to install the desktop (portable or fixed installation) size (high) x width x thick (not including receiver) desktop installation 60 x 210 x 140 mm (2.36 x 8.27 x Length of 5.51 inches) receiver DCN ‑ ‑ xx DS 312.3 mm (12.30 inch) DCN ‑ DL xx 477.4 mm (18.80 inch) weight DCN ‑ ‑ ‑ DS xx 1.2 kg (2.65 pounds) of DCN ‑ DL ‑ xx 1.2 kg (2.65 pounds) at the top of the color (RAL 9017) on the back of the black color (RAL) 9006 silver order information has a fixed short shank receiver (CN) of basic DCN - DS - CN The new generation DCN system with fixed short - handle microphone is the basic model of representative machine in China. The new dcn-dcn system with fixed long handle microphone (CN) is the Chinese version of the basic model of the new dcn-dcn system with fixed long handle microphone. Order number DCN - DL - CN with basic DCN - DS of fixed short shank receiver on behalf of the machine has a fixed short shank receiver of a new generation of DCN system basic representative machine order number DCN - DS has a fixed long handle the basic phone DCN - DL on behalf of the machine has a fixed long shank receiver of a new generation of DCN system basic representative machine order number DCN - DL hardware accessories DCN - DBCM button (10), chairman of the new generation of DCN system (10), chairman of the button. Order no. Dcn-dbcm dcn-disclm cable clamps (25 per set) for the new generation DCN system cable clamps (25 per set). Order number DCN - DISCLM